Patent EP-2105242-A1 (EP)
Inventor: KRIEGMAIR JOSEF
IPC: B23K26/42
Filed: 2009-03-26
Abstract: The method comprises providing a desired geometry of a component (10) e.g. turbine blade for the area of a hole (12) by a data processing system, where the desired geometry characterizes a first desired surface (14a) within the area of the hole, determining actual geometry of the component for the area of the hole by a measuring system, where the actual geometry characterizes a first actual surface (14a') of the component within the area of the hole and determining the actual geometry of the hole on the basis a deviation between the desired and actual geometry of the component. The method comprises providing a desired geometry of a component (10) e.g. turbine blade for the area of a hole (12) by a data processing system, where the desired geometry characterizes a first desired surface (14a) within the area of the hole, determining actual geometry of the component for the area of the hole by a measuring system, where the actual geometry characterizes a first actual surface (14a') of the component within the area of the hole, and determining the actual geometry of the hole on the basis a deviation between the desired and actual geometry of the component by the data processing system. The hole extends from the first surface to a second surface (14b) of the component. The desired geometry of the component characterizes the second desired surface and/or the actual geometry of the component characterizes the second actual surface of the component. The component and the measuring system are arranged relatively to each other before determining the actual geometry depending on the arrangement of the measuring system. The actual geometry of the component is determined by a tactile, optical, irradiating and/or ultrasonic measuring instrument of the measuring system. The geometries of the component characterize a micro geometry such as a dimension and/or a shape of the hole and/or a micro geometry such as a roughness and/or a cracking of the hole. The determining of the actual geometry of the component is carried out in a pre-determined search area of the component. The actual geometry is determined on the basis of box measures and a shape of a surface of the hole and/or on the basis of longitudinal dimensions (L1) and squares. Main levels of the component and/or a desired hole axis of the hole are determined. The main levels are determined on the basis of base points of the component, on the basis of points of plant of the component at a measuring device, on the basis of a detecting surface of the component and/or on the basis of a detecting component. A desired intersection point (18) of the hole in the actual surface is determined on the basis of desired hole axis and the actual geometry. An actual hole axis based on the desired geometry and/or an actual intersection point are determined. The desired hole axis is used for the determination of the actual hole axis. An area of actual geometry of the component, which lies outside of a pre-determined range of tolerance taking into account the desired geometry of the component, is not considered in the determination of the actual geometry of the hole. A funnel angle, a funnel width, a funnel depth, a funnel flank, a funnel junction for the surface of the component and/or a radius of curvature between the funnel junction and the surface of the component, are determined in the step of determining the actual geometry.